Have no idea how to find match colleges...

I’m a rising senior trying to make a list of possibilities. I know what my safeties and reaches are, but I’m having trouble finding matches? How do you know if a school is a match?
My GPA UW is 3.5, W is 3.6
and ACT is 25 (23M 23E 24S 28R)
My safeties:
MSU
Mizzou
Truman
UArk

Reaches:
Ohio State
Miami University (Oxford)
KU
SLU

how do you find matches??

Try running the SuperMatch engine on the left side of this page for a first cut.

In my opinion, you’ve already got some matches on that list, only you have them misclassified as safeties:
University of Arkansas
University of Missouri

The following schools are extremely high reaches because of your ACT scores:
Ohio State
Truman State
Saint Louis University
Miami University

Not sure which MSU and KU you are talking about, so I can’t comment on those.